JP3302620B2 - Noise absorbing device - Google Patents

Noise absorbing device

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Publication number
JP3302620B2
JP3302620B2 JP17902297A JP17902297A JP3302620B2 JP 3302620 B2 JP3302620 B2 JP 3302620B2 JP 17902297 A JP17902297 A JP 17902297A JP 17902297 A JP17902297 A JP 17902297A JP 3302620 B2 JP3302620 B2 JP 3302620B2
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magnetic member
magnetic
noise absorbing
noise
absorbing device
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JP17902297A
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JPH118123A (en
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純一 井上
常雄 山田
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タケチ工業ゴム株式会社
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Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明はケーブルに装着して用いるノイズ吸収装置に関する。 The present invention relates to relates to noise absorbing apparatus used by attaching to the cable.

【0002】 [0002]

【従来の技術】計測器などの電子機器においては、入出力用のケーブルを介して侵入するノイズや、外部へ出るノイズを、電子機器等の入出力側で吸収して除去するためのノイズ吸収装置を設けている(たとえば、実公昭6 In electronic devices such as the Prior Art Instrument, noise and entering through a cable for input and output, the noise emitted to the outside, the noise absorption for the removal by absorption in the input and output sides of an electronic device or the like is provided an apparatus (e.g., Japanese Utility Model 6
2−14770号公報参照)。 See Japanese Unexamined Patent Publication No. 2-14770). かかるノイズ吸収装置は、たとえばフェライトを筒形に成形した磁性部材で構成されている。 Such noise absorber is constituted by a magnetic member formed for example of ferrite into a cylindrical shape.

【0003】 [0003]

【発明が解決しようとする課題】しかし、前記フェライトからなる磁性部材では、100MHz〜数百MHz 程度の周波数のノイズを吸収することができるものの、かかる周波数よりも高い周波数のノイズは吸収できない。 [SUMMARY OF THE INVENTION However, in the magnetic member consisting of the ferrite, although it is possible to absorb the noise of a frequency of about 100MHz~ several hundred MHz, can not absorb high frequency noise than such frequency. 一方、フェライトよりも透磁率の低い磁性ゴムを磁性部材として用いたノイズ吸収装置では、800MHz〜数GHz 程度の周波数のノイズを吸収することができるものの、それ以下の低い周波数のノイズを吸収できない。 On the other hand, the noise absorbing apparatus using a magnetic member with low magnetic rubber permeability than ferrite, although it is possible to absorb the noise of a frequency of about 800MHz~ number GHz, can not absorb less low frequency noise. そこで、2種類のノイズ吸収装置を各々ケーブルに装着することもなされているが、ノイズ吸収装置の装着に手間がかかる。 Therefore, although the two have also been made to each attached to the cable noise absorber, it takes time to mount a noise absorber.

【0004】したがって、本発明の目的は、広い周波数の帯域にわたってノイズを吸収し得ると共に、装着の容易なノイズ吸収装置を提供することである。 It is therefore an object of the present invention, together with may absorb noise over a band of wide frequency is to provide an easy noise absorber mounting.

【0005】 [0005]

【課題を解決するための手段】前記目的を達成するために、本出願の第1発明は、筒状の第1磁性部材と、該第1磁性部材よりも透磁率の低い筒状の第2磁性部材とを、ケーブル挿通孔の軸方向に重ねると共に、これらの磁性部材を互いに固定したことを特徴とする。 To SUMMARY OF THE INVENTION To achieve the above object, the first invention of the present application includes a cylindrical first magnetic member, said first magnetic second lower cylindrical magnetic permeability than members a magnetic member, together with the overlap in the axial direction of the cable insertion hole, characterized in that these magnetic members were fixed to each other.

【0006】一方、第2発明は、筒状の第1磁性部材と、該第1磁性部材よりも透磁率の低い筒状の第2磁性部材とを、ケーブル挿通孔の径方向に重ねると共に、これらの磁性部材を互いに固定したことを特徴とする。 On the other hand, the second invention includes a cylindrical first magnetic member, and a second magnetic member of a low cylindrical magnetic permeability than the first magnetic member, the overlap in the radial direction of the cable insertion hole, wherein the these magnetic members were fixed to each other.

【0007】これらの発明によれば、互いに透磁率の異なる筒状の第1および第2磁性部材を設けており、各磁性部材は、別々の吸収帯域を有しているから、吸収帯域が拡がる。 [0007] According to these aspects of the invention, are provided with different cylindrical first and second magnetic members from each other permeability, the magnetic members, because they have separate absorption bands, spread the absorption band . 一方、2つの磁性部材を互いに固定したので、1回の装着作業でノイズ吸収装置をケーブルに装着することができる。 On the other hand, since the two magnetic members are fixed to each other, it is possible to mount the noise absorbing device to the cable in a single mounting operation.

【0008】本発明において、透磁率の高い第1磁性部材としては、たとえばフェライトを用いることができ、 [0008] In the present invention, the first magnetic member having high permeability can be used, for example ferrite,
一方、透磁率の低い第2磁性部材としては、ゴムにフェライトの粉末を添加したものや合成樹脂に導電性繊維体を添加したものなどを用いることができる。 On the other hand, as the lower second magnetic member having magnetic permeability, or the like can be used those obtained by adding conductive fibers body or a synthetic resin material obtained by adding powder of ferrite rubber.

【0009】本発明において「筒状」とは、円筒形の他に角筒形などの筒形を含み、更に、これらの形状のものを径方向に分割した2つ割れのものも含む。 [0009] In the present invention, the term "cylindrical" includes a tubular, such as square tube shape in addition to the cylindrical, also includes those two cracks obtained by dividing the one of these shapes in the radial direction. なお、「径方向に分割」とは、軸線を含む面または当該面に平行な面に、分割面が設定されていることをいう。 Note that the "divided in the radial direction", a plane parallel to the plane or the plane containing the axis, means that the dividing plane is set. また、ケーブル挿通孔は、円形断面である必要はなく、矩形断面等であってもよい。 Further, the cable insertion holes need not be circular cross section may be rectangular cross-section or the like.

【0010】 [0010]

【発明の実施の形態】以下、本発明の実施形態および本 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments and the present of the present invention
発明に含まれない例を図面にしたがって説明する。 Examples not included in the invention will be described with reference to the accompanying drawings. 図1 Figure 1
本発明に含まれない例を示す。 Shows an example that is not included in the present invention. イズ吸収装置は、たとえば2つの第1磁性部材1と、1つの第2磁性部材2 Noise absorbing device, for example, the first magnetic member 1 in two, one second magnetic member 2
とで構成されている。 It is composed of a. 各磁性部材1,2は、磁性体を筒状に形成してケーブル3を挿通するためのケーブル挿通孔4を有している。 Each magnetic member 1 has a cable insertion hole 4 for inserting the cable 3 by forming a magnetic material into a cylindrical shape. 第1磁性部材1はたとえばフェライトで構成されており、一方、第2磁性部材2は、第1磁性部材1よりも透磁率が低い磁性ゴムなどで構成されている。 The first magnetic member 1 is made of, for example, ferrite, while the second magnetic member 2, the magnetic permeability is configured by a lower magnetic rubber than the first magnetic member 1. 前記3つの磁性部材1,2,1は、各磁性部材1,2の間が接着剤で接着されて、ケーブル3の軸線方向Sに積層されている。 It said three magnetic members 1,2,1 during each magnetic members 1 and 2 is glued, is laminated in the axial direction S of the cable 3.

【0011】図2(a )は、実施形態を示す [0011] Figure 2 (a) shows an embodiment. 図2 Figure 2
(a)のノイズ吸収装置は、第2磁性部材2の内径D2 Noise absorbing device of (a) has an inner diameter D2 of the second magnetic member 2
が第1磁性部材1の内径D1よりも小さく設定されている。 There is set smaller than the first inner diameter D1 of the magnetic member 1. つまり、第2磁性部材2のケーブル挿通孔4は、第1磁性部材1のケーブル挿通孔4よりも径小である。 That is, the second cable insertion hole 4 of the magnetic member 2 is a smaller diameter than the first cable insertion hole 4 of the magnetic member 1. そのため、ケーブル3と第1磁性部材1のケーブル挿通孔4との間には、隙間ができるから、硬い第1磁性部材1 Therefore, between the cable insertion hole 4 of the cable 3 and the first magnetic member 1, because a gap, a hard first magnetic member 1
によってケーブル3が傷付くおそれがない。 Cable 3 there is no risk of being damaged by.

【0012】図2(b)のノイズ吸収装置は、一対の第2磁性部材2を設けると共に、該2つの第2磁性部材2 [0012] Figure 2 noise absorbing device of (b) is provided with a pair of second magnetic member 2, the two second magnetic member 2
の間に第1磁性部材1を配設している。 A first magnetic member 1 is disposed between. ここで、ゴムや樹脂にフェライトの粉末を添加した第2磁性部材2は、 Here, the second magnetic member 2 with the addition of powder of ferrite rubber or resin,
第1磁性部材1に比べて脆くなく、そのため、硬い第1 Not brittle in comparison with the first magnetic member 1, therefore, harder first
磁性部材1が両端の軟らかい第2磁性部材2によって保護されるから、第1磁性部材1が欠けたり割れたりするおそれがない。 Since the magnetic member 1 is protected by the soft second magnetic member 2 having opposite ends, there is no possibility that the first magnetic member 1 is cracked or chipped.

【0013】なお、磁性部材1,2の数は、3個に限らず、図2(c),(d)のように、2個または3個以上であってもよい。 [0013] Note that the number of the magnetic members 1 and 2 is not limited to three, FIG. 2 (c), the may be so, two or more of (d). また、第1磁性部材1および第2磁性部材2とは異なる透磁率の磁性体からなる第3磁性部材を設け、吸収帯域を更に広げてもよい。 Further, a third magnetic member made of a magnetic material of different permeability than the first magnetic member 1 and the second magnetic member 2 may be provided further spread the absorption band.

【0014】なお、各磁性部材1,2同士は必ずしも接着する必要はなく、たとえば、図2(e)に示すように、3つの磁性部材1,2,1を軸線方向Sに配設した状態で、熱収縮樹脂チューブ5によって3つの磁性部材1,2,1を囲撓して一体に固定してもよい。 [0014] Incidentally, the magnetic members 1 and 2 to each other is not always necessary to bond, for example, as shown in FIG. 2 (e), 3 one state magnetic member 1,2,1 is disposed in the axial direction S in may be fixed together by 囲撓 three magnetic members 1,2,1 by heat-shrinkable resin tube 5.

【0015】 図3の例においては、各磁性部材1,2がケーブル挿通孔4の径方向に2つに分割されていると共に、半割れの分割体1a,2aが、それぞれ、収容ケース6に収容されている。 [0015] In the example of Figure 3, together with the magnetic members 1 and 2 is divided into two in the radial direction of the cable insertion hole 4, half-split divided bodies 1a, 2a, respectively, in the accommodating case 6 It is housed. 該収容ケース6は、樹脂製で、 The housing case 6 is made of a resin,
径方向に分割された一対の分割ケース6a,6bが樹脂ヒンジ6cで連結されていると共に、ケース閉止用の係合部6d,6eを備えている。 Pair of divided case 6a which are divided in the radial direction, with 6b are connected by resin hinge 6c, and includes engagement portions 6d of the case for closing and 6e. 前記各磁性部材1,2 The respective magnetic members 1 and 2
は、図3(b)に示す突起部10が、収容ケース6の係合凹所60に係合して、収容ケース6に固定されていることで、各磁性部材1,2同士が互いに固定されている。 The protrusion portion 10 shown in FIG. 3 (b), engaged with the engagement recess 60 of the housing case 6, that is fixed to the housing case 6, the magnetic members 1 and 2 each other mutually fixed It is. なお、図3(c)のように、収容ケース6は、筒状に閉じた後、樹脂バンド7によって締め付けられ、図3 As in the FIG. 3 (c), the housing case 6, after closing the tubular tightened by the resin bands 7, FIG. 3
(a)の各分割体1a,2aの分割面が圧接するようになっている。 Each divided body 1a of (a), division surface of 2a is in pressure-contact.

【0016】ここで、フェライトまたは磁性ゴムからなる1つの磁性部材のみを分割ケース6a,6bに収容したものでは、フェライトまたは磁性ゴムごとに分割ケース6a,6bが必要になる。 [0016] Here, one magnetic member only separate casing 6a made of ferrite or magnetic rubber, than those contained in 6b, ferrite or divided case 6a for each magnetic rubber, 6b is required. つまり、複数個の収容ケース6が必要になる。 That is, a plurality of housing case 6 is required. したがって、コストアップの原因となる。 Therefore, the cause of the cost up. これに対し、本ノイズ吸収装置では、収容ケース6が1つでよいから、コストダウンを図ることもできる。 In contrast, in the noise absorbing device, since the accommodating case 6 may be one, it is also possible to reduce the cost.

【0017】なお、各磁性部材1,2は、収容ケース6 [0017] Incidentally, the magnetic members 1 and 2, the housing case 6
に収容されていることで互いに固定されるので、各磁性部材1,2同士を必ずしも接着する必要はない。 Because are fixed to each other by being housed in, it is not always necessary to bond the respective magnetic members 1 and 2 to each other. なお、 It should be noted that,
各磁性部材1,2の分割体1a,2aは、該分割体1 Divided body 1a of the magnetic members 1, 2, 2a, said split body 1
a,2aに係合凹部を形成し、一方、各分割ケース6 a, to form an engagement recess 2a, while each separate case 6
a,6bに係合突起を形成して、各分割ケースから脱落しないように分割ケース6a,6bに固定してもよい。 a, to form the engagement protrusions 6b, the divided case 6a so as not to fall off from each separate case, may be fixed to 6b.

【0018】以上のは、第1磁性部材1と第2磁性部材2とをケーブル挿通孔4の軸方向に重ねたが、図4〜 The above example has been superimposed first magnetic member 1 and the second magnetic member 2 in the axial direction of the cable insertion hole 4, 4 to
図6の実施形態では、第1磁性部材1と第2磁性部材2 In the embodiment of FIG. 6, the first magnetic member 1 and the second magnetic member 2
とをケーブル挿通孔4の径方向に重ねると共に、これらの磁性部材1,2を互いに固定している。 Preparative with overlap in the radial direction of the cable insertion hole 4, and fixing these magnetic members 1 and 2 to each other.

【0019】 4(a),(b)に示すように、第2磁性部材2は第1磁性部材1に一体に成形されて固着されていると共に第1磁性部材1の内周側に配設されている。 [0019] FIG. 4 (a), the (b), the second magnetic member 2 distribution in the first inner peripheral side of the magnetic member 1 with are secured are molded integrally with the first magnetic member 1 It has been set. また、第2磁性部材2のケーブル挿通孔4は、図4 The second cable insertion hole 4 of the magnetic member 2, FIG. 4
(b)に示すように、テーパー状に形成されて、径小部4aを有しており、矢印A方向から挿通したケーブルが抜けにくい構造となっており、ケーブルに対するノイズ吸収装置の位置がズレにくいので、ノイズの吸収特性が変動しにくいという利点を持つ。 (B), the are tapered, has a small diameter portion 4a, has a hard missing cable inserted from the direction of arrow A structure, the deviation position of the noise absorbing device for a cable so hard to, with the advantage that the absorption characteristics of the noise is less likely to change. また、本実施形態では、素材が柔らかな第2磁性部材2を第1磁性部材1の内周側に設けたので、ノイズ吸収装置に挿通したケーブルが傷付きにくいという利点もある。 Further, in the present embodiment, since the material is provided with the soft second magnetic member 2 in the first inner peripheral side of the magnetic member 1, there is an advantage that cable inserted through the noise absorber is hardly scratched.

【0020】なお、ケーブル挿通孔4の形状は、図4 [0020] The shape of the cable insertion hole 4, 4
(c),(d)のような形状であってもよい。 (C), it may have a shape such as (d).

【0021】図5 は変形例を示す。 [0021] FIG. 5 shows a change Katachirei. 図5(a)のノイズ吸収装置は、第2磁性部材2を第1磁性部材1の外周側に配設したものである。 Noise absorbing device of FIG. 5 (a) is obtained by disposing the second magnetic member 2 to the first outer peripheral side of the magnetic member 1. この場合、ゴムにフェライト粉末を添加した磁性ゴムなどで第2磁性部材2を構成することにより、脆い第1磁性部材1に衝撃力が付加されるのを防止でき、第1磁性部材1を保護して第1磁性部材1の割れや欠けを防止することができる。 In this case, by forming the second magnetic member 2 such as a magnetic rubber with the addition of ferrite powder to the rubber, the brittle first magnetic member 1 can prevent the impact force is added, protecting the first magnetic member 1 a first cracking and chipping of the magnetic member 1 can be prevented by.

【0022】なお、図5(b)のように、第1磁性部材1の外周面だけでなく第1磁性部材1の端面1bも第2 [0022] Incidentally, FIG. 5 as shown in (b), the first end face 1b of the magnetic member 1 not only the first outer peripheral surface of the magnetic member 1 also second
磁性部材2で被うようにしてもよい。 It may be covered with a magnetic member 2.

【0023】図5(c)のノイズ吸収装置は、第1磁性部材1の内周面、外周面および端面1bを第2磁性部材2で被ったものである。 The noise absorbing device of FIG. 5 (c), in which the inner peripheral surface of the first magnetic member 1, the outer peripheral surface and end surface 1b suffered by the second magnetic member 2. 本ノイズ吸収装置によれば、第1磁性部材1およびケーブル3の双方を保護することができる。 According to the noise absorbing device, it is possible to protect both the first magnetic member 1 and the cable 3.

【0024】なお、前記図4および図5(a)〜(c) [0024] Incidentally, FIG. 4 and FIG. 5 (a) ~ (c)
の実施形態においても、ノイズ吸収装置を図5(d)のように分割型とし、収容ケース6内に第1磁性部材1および第2磁性部材2を収容してもよい。 In embodiments also noise absorber and split type as shown in FIG. 5 (d), the first may accommodate the magnetic member 1 and the second magnetic member 2 in the accommodating case 6.

【0025】図6 は実施形態を示す。 [0025] FIG. 6 shows the implementation form. の実施形態では、第1磁性部材1がケーブル挿通孔4の径方向に2つに分割されている。 The implementation form of this, the first magnetic member 1 is divided into two in the radial direction of the cable insertion hole 4. 一方、第2磁性部材2は第1磁性部材1を収容する収容ケース6を構成している。 Meanwhile, the second magnetic member 2 constituting the accommodating case 6 which accommodates a first magnetic member 1. すなわち、該収容ケース6は、磁性体を添加したゴムまたは樹脂からなり、一対の分割ケース6a,6bが樹脂ヒンジ6cで連結されていると共に、ケース閉止用の係合部6 In other words, the accommodation case 6 is made of the added rubber or resin magnetic body, the pair of split casing 6a, together 6b are connected by resin hinge 6c, the engaging portion of the case for closing 6
d,6eを備えている。 d, it is equipped with a 6e.

【0026】図6(b)に示すように、前記第1磁性部材1の突起部10と、第2磁性部材2の係合凹所20 As shown in FIG. 6 (b), the first protrusion 10 of the magnetic member 1, the second magnetic member 2 engages the recess 20
は、互いに係合しており、第1磁性部材1と第2磁性部材2とが互いに固定されて、第1磁性部材1が第2磁性部材2から脱落しないようになっている。 Are engaged with each other, the first magnetic member 1 and the second by the magnetic member 2 are fixed to each other, the first magnetic member 1 is prevented from falling off from the second magnetic member 2. なお、図6 It should be noted that, as shown in FIG. 6
(c)に示すように、収容ケース6は筒状に閉じた後、 (C), the following housing case 6 is closed in a cylindrical shape,
樹脂バンド7によって締め付けられる。 Tightened by the resin band 7. なお、図6 It should be noted that, as shown in FIG. 6
(c)の状態においては、第1磁性部材1と第2磁性部材2とが固定されるので、前記図6(a)の突起部10 In the state of (c), since the first magnetic member 1 and the second magnetic member 2 is fixed, the protrusion 10 of FIG 6 (a)
や係合凹所20は必ずしも必要ではない。 And the engagement recess 20 is not necessarily required.

【0027】本実施形態によれば、従来の分割ケース付のノイズ吸収装置のケースの素材に磁性体を添加するだけで、ノイズの吸収帯域を広げることができる。 In accordance with the present embodiment, the material of the case of the noise absorbing device with a conventional split case only the addition of magnetic material, it is possible to widen the absorption band of the noise.

【0028】なお、前記各実施形態では、ケーブル挿通孔にケーブルを1本だけ通したが、ケーブル挿通孔にケーブルを複数本通してもよいし、ケーブルを巻回して複数回通してもよい。 [0028] Incidentally, in the respective embodiments, but through only one of the cables to the cable insertion hole, may be passed through a plurality of cables to the cable insertion hole, it may be passed through several times by winding cable.

【0029】 [0029]

【発明の効果】以上説明したように、本発明によれば、 As described in the foregoing, according to the present invention,
互いに透磁率の異なる筒状の第1および第2磁性部材を設けており、各磁性部材は別々の吸収帯域を有しているから、ノイズの吸収帯域が広がる。 Each other and provided with different cylindrical first and second magnetic members permeability, since each magnetic member has a separate absorption band, absorption band of noise is increased. 一方、2つの磁性部材を互いに固定したので、1回の装着作業でノイズ吸収装置をケーブルに装着することができる。 On the other hand, since the two magnetic members are fixed to each other, it is possible to mount the noise absorbing device to the cable in a single mounting operation.

【0030】また、軸方向に磁性部材を重ねた第1発明においては、第2磁性部材のケーブル挿通孔を第1磁性部材のケーブル挿通孔よりも径小にすれば、硬い材質の第1磁性部材のケーブル挿通孔でケーブルの外表面が傷付きにくくなる。 [0030] In the first invention of extensive magnetic member in the axial direction, if the cable insertion hole of the second magnetic member in the cable insertion hole smaller diameter than the first magnetic member, the first magnetic hard material the outer surface of the cable is less likely scratched by a cable insertion hole of the member.

【0031】また、2つの第2磁性部材の間に第1磁性部材を設ければ、軟らかい材質の第2磁性部材によって、脆い材質の第1磁性部材を衝撃力から保護することができる。 Further, by providing the first magnetic member between the two second magnetic member, the second magnetic member of the soft material, the first magnetic member of brittle material can be protected from the impact force.

【0032】また、分割型のタイプでは、複数種類の磁性部材を1つの収容ケースで収容できるから、製造コストも安価になる。 [0032] In the split type, since a plurality of types of the magnetic member can be accommodated in one housing case, production cost is inexpensive.

【0033】一方、ケーブル挿通孔の径方向に磁性部材を重ねた第2発明においては、軟質の第2磁性部材を硬質の第1磁性部材の内周側に配設すれば、ケーブル挿通孔が軟質の第2磁性部材で形成されるから、ケーブルが傷付くおそれもない。 On the other hand, in the second aspect of extensive magnetic member in the radial direction of the cable insertion hole, if provided the second magnetic member soft on the inner peripheral side of the first magnetic member rigid cable insertion hole since formed by the second magnetic member of a soft, there is no risk of the cable being damaged. 特に、ケーブル挿通孔をテーパー状にして、径小部を設ければ、該径小部によって、ケーブルに対してノイズ吸収装置を固定できるから、ノイズの吸収特性が変動しにくいという利点がある一方で、ケーブルが傷付くのを防止できる。 In particular, the cable insertion hole in a tapered shape, by providing the small diameter portion, the 該径 small portion, because it secures the noise absorbing device to the cable, while there is an advantage that the absorption characteristic of the noise is hardly fluctuates in, it is possible to prevent the cable being damaged.

【0034】逆に、軟質の第2磁性部材を脆い第1磁性部材の外周側に配設すれば、脆い第1磁性部材を第2磁性部材によって保護できるから、第1磁性部材が欠けたり、割れたりするおそれがない。 [0034] Conversely, if disposed a second magnetic member soft on the outer peripheral side of the brittle first magnetic member, because the fragile first magnetic member can be protected by the second magnetic member, or missing the first magnetic member, there is no risk of cracking or.

【0035】また、軟らかい第2磁性部材によって第1 Further, first the soft second magnetic member
磁性部材の内周面および外周面の双方を被えば、第1磁性部材およびケーブルの双方を保護することができる。 If barnyard both the inner and outer peripheral surfaces of the magnetic member, it is possible to protect both the first magnetic member and the cable.

【0036】また、分割型のタイプでは、第2磁性部材によって第1磁性部材の収容ケースを形成すれば、収容ケースの素材を変えるだけで、ノイズの吸収帯域を広げることができる。 [0036] In the split type, by forming the housing case of the first magnetic member by the second magnetic member, only by changing the material of the housing case, it is possible to widen the absorption band of the noise.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明に含まれない例を示すノイズ吸収装置の断面図および斜視図である。 1 is a cross-sectional view and a perspective view of a noise absorbing device illustrating an example that is not included in the present invention.

【図2】 (a)は本発明の実施形態を示すノイズ吸収装置の断面図、(b)〜(e)は他の例を示す断面図である。 Figure 2 (a) is a sectional view of a noise absorbing apparatus according to an embodiment of the present invention, (b) ~ (e) is a sectional view showing another example.

【図3】 径方向に分割したノイズ吸収装置の斜視図および断面図である。 3 is a perspective view and a cross-sectional view of the divided noise absorber in the radial direction.

【図4】 本発明の実施形態を示すノイズ吸収装置の斜視図および断面図である。 It is a perspective view and a cross-sectional view of a noise absorbing apparatus according to an embodiment of the present invention; FIG.

【図5】 本発明の実施形態の変形例を示すノイズ吸収装置の断面図である。 5 is a cross-sectional view of a noise absorbing device of a modified version of the embodiment of the present invention.

【図6】 本発明の実施形態を示すノイズ吸収装置の斜視図および横断面図である。 6 is a perspective view and a cross-sectional view of a noise absorbing apparatus according to an embodiment of the present invention.

【符号の説明】 DESCRIPTION OF SYMBOLS

1:第1磁性部材 2:第2磁性部材 4:ケーブル挿通孔 6:収容ケース 6a,6b:分割ケース 1: The first magnetic member 2: the second magnetic member 4: cable insertion hole 6: housing case 6a, 6b: split case

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平5−29152(JP,A) 特開 平7−58482(JP,A) 特開 平5−121244(JP,A) 実開 昭61−55327(JP,U) (58)調査した分野(Int.Cl. 7 ,DB名) H01F 17/06 H04B 15/00 H05K 9/00 ────────────────────────────────────────────────── ─── of the front page continued (56) reference Patent flat 5-29152 (JP, a) JP flat 7-58482 (JP, a) JP flat 5-121244 (JP, a) JitsuHiraku Akira 61- 55327 (JP, U) (58 ) investigated the field (Int.Cl. 7, DB name) H01F 17/06 H04B 15/00 H05K 9/00

Claims (8)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】 磁性体を筒状に形成してケーブル挿通孔を設けた筒状の磁性部材を備えたノイズ吸収装置において、 筒状の硬い第1磁性部材と、該第1磁性部材よりも透磁率の低い筒状の軟らかい第2磁性部材とを、ケーブル挿通孔の軸方向に重ねると共に、これらの磁性部材を互いに固定し、 前記第2磁性部材のケーブル挿通孔を、前記第1磁性部 1. A noise absorbing device having a cylindrical magnetic member having a cable insertion hole by forming a magnetic material into a tubular shape, and stiff cylindrical first magnetic member, than the first magnetic member a lower tubular of soft second magnetic member having magnetic permeability, with overlap in the axial direction of the cable insertion hole, fixed these magnetic members together, the cable insertion hole of the second magnetic member, the first magnetic portion
    材のケーブル挿通孔よりも径小としたことを特徴とするノイズ吸収装置。 Noise absorbing apparatus being characterized in that the smaller diameter than the cable insertion hole of the wood.
  2. 【請求項2】 請求項1において、 前記各磁性部材が径方向に分割されていると共に、これらの分割された磁性部材が一対の半割れの分割ケース内に収容されているノイズ吸収装置。 2. A method according to claim 1, wherein with each magnetic member is divided in the radial direction, these divided noise absorbing apparatus magnetic member is housed in the pair of half-split split case.
  3. 【請求項3】 磁性体を筒状に形成してケーブル挿通孔を設けた筒状の磁性部材を備えたノイズ吸収装置において、 筒状の硬質の第1磁性部材と、該第1磁性部材よりも透磁率の低い筒状の軟らかい材質の第2磁性部材とを、ケーブル挿通孔の径方向に重ねると共に、これらの磁性部材を互いに固定し、 前記軟らかい材質の第2磁性部材を脆い第1磁性部材の 3. A noise absorbing device of the magnetic body with a cylindrical shape formed by the cable insertion hole and provided a cylindrical magnetic member, a first magnetic member of cylindrical rigid than the first magnetic member and a second magnetic member of a low cylindrical soft material having magnetic permeability, with overlap in the radial direction of the cable insertion hole, fixed these magnetic members together, the first magnetic fragile the second magnetic member of the soft material of member
    内周側に配設したノイズ吸収装置。 Noise absorbing device which is disposed on the inner peripheral side.
  4. 【請求項4】 請求項3において、 前記軟らかい材質の第2磁性部材のケーブル挿通孔をテ 4. The method of claim 3, Te the cable insertion hole of the second magnetic member of the soft material
    ーパー状に形成して、ケーブルが抜けにくいようにする Formed in supermarkets shape, so that the cable does not remove easily
    ための径小部を設けたノイズ吸収装置。 Noise absorbing apparatus having a small-diameter portion for.
  5. 【請求項5】 磁性体を筒状に形成してケーブル挿通孔を設けた筒状の磁性部材を備えたノイズ吸収装置において、 筒状の脆い第1磁性部材と、該第1磁性部材よりも透磁率の低い筒状の軟らかい材質の第2磁性部材とを、ケーブル挿通孔の径方向に重ねると共に、これらの磁性部材を互いに固定し、 前記軟らかい材質の第2磁性部材を脆い第1磁性部材の 5. A noise absorbing device having a cylindrical magnetic member having a cable insertion hole by forming a magnetic material into a tubular shape, and brittle tubular first magnetic member, than the first magnetic member and a second magnetic member of a low cylindrical with soft material permeability, with overlap in the radial direction of the cable insertion hole, fixed these magnetic members together, the first magnetic member fragile the second magnetic member of the soft material of
    外周側に配設したノイズ吸収装置。 Noise absorbing device which is disposed on the outer peripheral side.
  6. 【請求項6】 磁性体を筒状に形成してケーブル挿通孔を設けた筒状の磁性部材を備えたノイズ吸収装置において、 筒状の脆い第1磁性部材と、該第1磁性部材よりも透磁率の低い筒状の軟らかい材質の第2磁性部材とを、ケーブル挿通孔の径方向に重ねると共に、これらの磁性部材を互いに固定し、 前記軟らかい材質の第2磁性部材によって前記脆い第1 6. The noise absorbing device having a cylindrical magnetic member having a cable insertion hole by forming a magnetic material into a tubular shape, and brittle tubular first magnetic member, than the first magnetic member and a second magnetic member of a low cylindrical with soft material permeability, with overlap in the radial direction of the cable insertion holes, to secure these magnetic members together, brittle said by the second magnetic member of the soft material first
    磁性部材の内周面および外周面が覆われているノイズ吸収装置。 Noise absorber inner and outer peripheral surfaces of the magnetic member is covered.
  7. 【請求項7】 請求項3,4,5もしくは6において、 前記第1および第2磁性部材がそれぞれ径方向に分割されていると共に、前記第2磁性部材が第1磁性部材を収容するケースを構成しているノイズ吸収装置。 7. The method of claim 3, 4, 5 or 6, together with the first and second magnetic members are each divided in the radial direction, a case where the second magnetic member for accommodating the first magnetic member configured to have noise absorbing device.
  8. 【請求項8】 請求項1ないし7のいずれか1項におい 8. any one smell of claims 1 to 7
    て、 前記第1磁性部材がフェライトで構成され、 一方、前記第2磁性部材が合成樹脂に導電性繊維体を添 Attachment Te, the first magnetic member is composed of ferrite, while the second magnetic member is an electrically conductive fiber material on the synthetic resin
    加したもの、あるいは、ゴムまたは樹脂にフェライトの Those that have been pressurized, or rubber or resin ferrite
    粉末を添加したものからなる、ノイズ吸収装置。 Powder consisting of those obtained by adding the noise absorbing device.
JP17902297A 1997-06-18 1997-06-18 Noise absorbing device Expired - Fee Related JP3302620B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17902297A JP3302620B2 (en) 1997-06-18 1997-06-18 Noise absorbing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17902297A JP3302620B2 (en) 1997-06-18 1997-06-18 Noise absorbing device

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JP3302620B2 true JP3302620B2 (en) 2002-07-15

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JP4412702B2 (en) * 2003-03-28 2010-02-10 スミダコーポレーション株式会社 Inductance element
US7023313B2 (en) 2003-07-16 2006-04-04 Marvell World Trade Ltd. Power inductor with reduced DC current saturation
US7489219B2 (en) 2003-07-16 2009-02-10 Marvell World Trade Ltd. Power inductor with reduced DC current saturation
US7307502B2 (en) 2003-07-16 2007-12-11 Marvell World Trade Ltd. Power inductor with reduced DC current saturation
US7872454B2 (en) 2003-08-21 2011-01-18 Marvell World Trade Ltd. Digital low dropout regulator
US7760525B2 (en) 2003-08-21 2010-07-20 Marvell World Trade Ltd. Voltage regulator
JP2006005236A (en) * 2004-06-18 2006-01-05 Murata Mfg Co Ltd Component for noise countermeasure and its mounting structure
JP2008226915A (en) * 2007-03-08 2008-09-25 Tdk Corp Magnetic part
US9171661B2 (en) 2010-04-26 2015-10-27 Takashige Terakawa Noise reducer
JP2013258335A (en) * 2012-06-13 2013-12-26 Seiwa Electric Mfg Co Ltd Ferrite core
JP2014096538A (en) * 2012-11-12 2014-05-22 Kitagawa Ind Co Ltd Composite ferrite core and noise current absorption tool
JP6379401B2 (en) * 2014-09-11 2018-08-29 北川工業株式会社 Output noise reduction device
KR101876800B1 (en) * 2018-04-02 2018-07-10 정기범 Apparatus for removing motor noise

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